Having awaited development for 30 years, this famous London landmark is now being restored and given a new lease of life and will be home to events space, shops, restaurants, offices and a limited number of new homes.
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Industrial vacuum cleaners and magnetic wands will be used each night during the summer to remove metal particles, dust, oil and grease.
Detective Superintendent Fiona McCormack said the Hotpoint FF175BP model had not been subject to any product recall.
Security for this year's event on July 8 has been reviewed following a spate of terror attacks in the capital.